Laziness is the lack of desire to act or work in general or to do an act or work that is expected of a person. In extreme cases, a generalized tendency to do nothing may verge on apathy and be a symptom of depression.

Lust is any intense desire or craving for self gratification. Lust can mean strictly sexual lust, although it is also common to speak of a "lust for life", "lust for blood (bloodlust for short)", or a "lust for power" or other goals.